I need to tell this to you guys, I swear this guy at work, a sales manager, is a closet stan

He’s like end 30, straight, you know family, kids and dog type of guy.
Ever since I posted on Facebook about going to her concert he always brings her up in ALL of our conversations, mail or phone.
First with the concert, I thought he was just being polite and he asked how it was and I told him that it was awesome and great sold out show and he responded with “I didn’t expect anything less from such a superstar” which was nice for him to say obviously.
But since then, he always starts his mail or phone call with “Hey Gaga” …like.. whet?
I called him today to discuss a client and first thing he said was “I read in the news paper today that Gaga was raped when she was younger” (odd way to start a convo but ok) so we had like a 5 minute conversation about her interview and I started talking with him going “yeah I read that too” “ hmm indeed that’s what I heard” like he’s genuinely interested in her.